<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		div{
			display: none;
			width: 100px;
			height: 100px;
			background: red;
		}

	</style>
	<script type="text/javascript" src="/bower_components/jquery/dist/jquery.js"></script>
	<script type="text/javascript">
			$(function() {
				$('button').click(function(event) {
					$('div').toggle();
				});
			});

	</script>
</head>
<body>
	<div></div>
	<button>按钮</button>
</body>
</html>